OPA2625 Texas instruments

OPA2625

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OPA2625

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Описание

The OPAx625 family of operational amplifiers are excellent 16-bit and 18-bit, SAR ADC drivers that are high precision with low THD and noise allow for a unique power-scalable solution. This family of devices is fully characterized and specified with a 16-bit settling time of 280 ns that enables a true 16-bit effective number of bits (ENOB). Along with a high dc precision of only 100 µV offset voltage, a wide gain-bandwidth product of 120 MHz, a low wideband noise of 2.5 nV/√Hz, this family is optimized for driving high-throughput, high-resolution SAR ADCs, such as the ADS88xx family of SAR ADCs. The OPAx625 features two operating modes: high-drive and low-power. In the innovative low-power mode, the OPAx625 tracks the input signal allowing the OPAx625 to transition from low-power mode to high-drive mode at 16-bit ENOB within 170 ns. The OPAx625 family is available in 6-pin SOT and 10-pin VSSOP packages and is specified for operation from –40°C to +125°C.

High-Drive Mode:
- GBW (G = 100): 120 MHz
- Slew Rate: 115 V/µs
- 16-Bit Settling at 4-V Step: 280 ns
- Low Voltage Noise: 2.5 nV/√Hz at 10 kHz
- Low Output Impedance: 1 Ω at 1 MHz
- Offset Voltage: ±100 µV (max)
- Offset Voltage Drift: ±3 µV/ºC (max)
- LowQuiescent Current: 2 mA (typ)
Low-Power Mode:
- GBW: 1 MHz
- Low Quiescent Current: 270 µA (typ)
Power-Scalable Features:
- Ultrafast Transition from Low-Power to High-Drive Mode: 170 ns
High AC and DC Precision:
- Low Distortion: –122 dBc for HD2 and –140 dBc for HD3 at 100 kHz
- Input Common-Mode Range Includes Negative Rail
- Rail-to-Rail Output
- Wide Temperature Range: Fully Specified from –40°C to +125°C

Architecture	Voltage FB
Number of channels	2
Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V)	2.7
Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V)	5.5
GBW (typ) (MHz)	120
BW at Acl (MHz)	120
Acl, min spec gain (V/V)	1
Slew rate (typ) (V/µs)	115
Vn at flatband (typ) (nV√Hz)	2.5
Vn at 1 kHz (typ) (nV√Hz)	3.2
Iq per channel (typ) (mA)	2
Vos (offset voltage at 25°C) (max) (mV)	0.1
Rail-to-rail	In to V-, Out
Features	Adjustable BW/IQ/IOUT, C-Load Drive, Shutdown
Rating	Catalog
Operating temperature range (°C)	-40 to 125
CMRR (typ) (dB)	117
Input bias current (max) (pA)	4000000
Offset drift (typ) (µV/°C)	0.5
Iout (typ) (mA)	100
2nd harmonic (dBc)	144
3rd harmonic (dBc)	155
Frequency of harmonic distortion measurement (MHz)	0.01